Follow vdc naming convention: earlyBootEnded

vdc commands use camelCase, not kebab-case.

Test: EarlyBootKeyTest.CannotCreateEarlyBootKeys
Change-Id: I5bcc9c435c848f5054e81ffaf87ae32577548570
diff --git a/rootdir/init.rc b/rootdir/init.rc
index 52ba921..90c8089 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -828,7 +828,7 @@
 
     # After apexes are mounted, tell keymaster early boot has ended, so it will
     # stop allowing use of early-boot keys
-    exec - system system -- /system/bin/vdc keymaster early-boot-ended
+    exec - system system -- /system/bin/vdc keymaster earlyBootEnded
 
     # Special-case /data/media/obb per b/64566063
     mkdir /data/media 0770 media_rw media_rw encryption=None